Sulfur dye.



many, have invented UNHE sTA 00., 11m, on NEW Yon/z, N. Y., a idnron'e'rroit or NEW YORK SULFUR era 1,140,745, Specification of Lettn rater e.

No Drawing.

To all whom it may concern .Be it known that I, BERNHARD JAECKEL, chemist, doctor of philosophy, citizen of the German Empire, residing at Ell'rerfeld, GerneW and useful Improvements in Sulfur Dyes, of which the following is a specification.

I have found that new and valuable sulfur dyes can be obtained by heating with sulfur and benz'idin compounds aromatic bases having most probably the formula:

CH GH -X RN Y Y includes hydrogen and alkyl e. g. a 'G2}I5, 2 8 s; Stand ing for a substituent e. 9. OH, OG H JHO 'H and R standing for an arcmatic hydrocarbon radical e. g.

i CBH57 I C H (naphthylamin) C H. -O H NH (benzidin) 0 H, CH3 (toluidin),

on O H CH: (Xylidin), etc.

- ethylcndiphenyldiamin The new sulfur colors are after being dried and pulverized yellowish powders inand beta-naph-' brown coloration;

gether with 80 parts of sulfur. Subsequently the temperature is slowly raised to 230250- C. After 6-8 hours the reaction is complete. The well powdered melt is then dissolved in'200 parts of caustic soda lye (35 Be.) by heating to 110120 C. After diluting the solution with water to 1600 parts the dye is precipitated by means of dilutehydrochloric acid in the shape of a yellow precipitate. It is after being and pulverized a yellow powder insoluble in water, soluble in concentrated sulfuric acid with a yellowish-brown coloration.- It dyes unmordanted cotton from an alkaline hydrosulfite bath or a sodium sulfid bath pure and brilliant greenish-yellow shades fast to boiling and to chlorin. After the dyeing the cotton is to I claim: 1. The new sulfur dyes obtainable by heating with sulfur .and benzidin combe rinsed with dilute acetic acid to obtain the pure yellow shades.

e rata ees- GEEMKlil'Y res-limes re sr amemeests retested May as}; ieia- Application filed September 11, 1914 Serial No. 861,284. i V. a

dried pounds aromaticbases having most probably the formula I OH3 OH3-X in which X includes hydrogen and al 1,

Y Y stands for a substituent, and R stands or dyes are after being dried and pulverized yellowish powders being insoluble in water and soluble in concentrated sulfuric acid generally with a yellowish-brown coloration; and dyeing unmordanted cottongenerally yellow shades fast to chlorin and to boiling substantially as described.

E2. The new sulfur d'yes' obtainable by hale-ting with sulfur and benzidin compounds aromatic bases having most prob-- ably the formula CH CH,--X

rottnugeuel'ally yellow shades fast to chlorin and to boiling, substantially as desel'i l led.

3. The new sulfur dye obtained from etlrvluuiliu uud benzidin. which is after being dried and pulverized :1 yellow powder insoluble in water and soluble in concencalm-alien: and dyeing umuurduuted cotton 10 in pure and greenish-yelluw shades fast to ehlm'iu and to boiling, substantially as described.

lu luslllllully whereof I have hereunto set my hand in the presence of two subscribing wiluesses.

BERN [ll-UH) JAECKEL. [L. 2.]

Witnesses:

ALBERT N L rim. 

